Intramolecular 1,4-dipolar cycloaddition of cross-conjugated heterocyclic betaines. A new route to hexahydrojulolidines and related peri-fused ring systems
摘要:
Alkenyl-substituted bicyclic anhydro-4-hydroxy-2-oxo-1,3-thiazinium hydroxides prepared from 3,3-disubstituted thiolactams and 1,3-bielectrophiles formed thermally-induced intramolecular cycloadducts which underwent loss of carbonyl sulfide, followed by a 1,5-hydrogen shift, to hexahydrojulolidines and related ring systems.
Intramolecular 1,4-dipolar cycloaddition of cross-conjugated heterocyclic betaines. A new route to hexahydrojulolidines and related peri-fused ring systems
摘要:
Alkenyl-substituted bicyclic anhydro-4-hydroxy-2-oxo-1,3-thiazinium hydroxides prepared from 3,3-disubstituted thiolactams and 1,3-bielectrophiles formed thermally-induced intramolecular cycloadducts which underwent loss of carbonyl sulfide, followed by a 1,5-hydrogen shift, to hexahydrojulolidines and related ring systems.